Answer:
Step-by-step explanation:
Because the parents are clever and they are united in the protection of the young. Also coyotes travel in packs and the other adults help out. The non alphas regard the pups of the alpha pair as their own and guard them as though that was true.
Coyotes are very interesting to read about, and I recommend you do it. Throughout the years I've read a great deal about Coyotes and I admire them immensely. Other people are not so generous in the appraisal.